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   <div id="projectname">Reranker Framework (ReFr)
   
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   <div id="projectbrief">Reranking framework for structure prediction and discriminative language modeling</div>
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<div class="title">symbol-table.H</div>  </div>
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<a href="symbol-table_8_h.html">Go to the documentation of this file.</a><div class="fragment"><pre class="fragment"><a name="l00001"></a>00001 <span class="comment">// Copyright 2012, Google Inc.</span>
<a name="l00002"></a>00002 <span class="comment">// All rights reserved.</span>
<a name="l00003"></a>00003 <span class="comment">// </span>
<a name="l00004"></a>00004 <span class="comment">// Redistribution and use in source and binary forms, with or without</span>
<a name="l00005"></a>00005 <span class="comment">// modification, are permitted provided that the following conditions are</span>
<a name="l00006"></a>00006 <span class="comment">// met:</span>
<a name="l00007"></a>00007 <span class="comment">// </span>
<a name="l00008"></a>00008 <span class="comment">//   * Redistributions of source code must retain the above copyright</span>
<a name="l00009"></a>00009 <span class="comment">//     notice, this list of conditions and the following disclaimer.</span>
<a name="l00010"></a>00010 <span class="comment">//   * Redistributions in binary form must reproduce the above</span>
<a name="l00011"></a>00011 <span class="comment">//     copyright notice, this list of conditions and the following disclaimer</span>
<a name="l00012"></a>00012 <span class="comment">//     in the documentation and/or other materials provided with the</span>
<a name="l00013"></a>00013 <span class="comment">//     distribution.</span>
<a name="l00014"></a>00014 <span class="comment">//   * Neither the name of Google Inc. nor the names of its</span>
<a name="l00015"></a>00015 <span class="comment">//     contributors may be used to endorse or promote products derived from</span>
<a name="l00016"></a>00016 <span class="comment">//     this software without specific prior written permission.</span>
<a name="l00017"></a>00017 <span class="comment">//</span>
<a name="l00018"></a>00018 <span class="comment">// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS</span>
<a name="l00019"></a>00019 <span class="comment">// &quot;AS IS&quot; AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT</span>
<a name="l00020"></a>00020 <span class="comment">// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR</span>
<a name="l00021"></a>00021 <span class="comment">// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT</span>
<a name="l00022"></a>00022 <span class="comment">// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,</span>
<a name="l00023"></a>00023 <span class="comment">// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT</span>
<a name="l00024"></a>00024 <span class="comment">// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,           </span>
<a name="l00025"></a>00025 <span class="comment">// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY           </span>
<a name="l00026"></a>00026 <span class="comment">// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT</span>
<a name="l00027"></a>00027 <span class="comment">// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE</span>
<a name="l00028"></a>00028 <span class="comment">// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.</span>
<a name="l00029"></a>00029 <span class="comment">// -----------------------------------------------------------------------------</span>
<a name="l00030"></a>00030 <span class="comment">//</span>
<a name="l00031"></a>00031 <span class="comment">//</span>
<a name="l00036"></a>00036 <span class="comment"></span>
<a name="l00037"></a>00037 <span class="preprocessor">#ifndef RERANKER_SYMBOL_TABLE_H_</span>
<a name="l00038"></a>00038 <span class="preprocessor"></span><span class="preprocessor">#define RERANKER_SYMBOL_TABLE_H_</span>
<a name="l00039"></a>00039 <span class="preprocessor"></span>
<a name="l00040"></a>00040 <span class="preprocessor">#include &lt;iostream&gt;</span>
<a name="l00041"></a>00041 <span class="preprocessor">#include &lt;string&gt;</span>
<a name="l00042"></a>00042 <span class="preprocessor">#include &lt;tr1/unordered_map&gt;</span>
<a name="l00043"></a>00043 <span class="preprocessor">#include &lt;vector&gt;</span>
<a name="l00044"></a>00044 
<a name="l00045"></a>00045 <span class="keyword">namespace </span>reranker {
<a name="l00046"></a>00046 
<a name="l00047"></a>00047 <span class="keyword">using</span> std::cerr;
<a name="l00048"></a>00048 <span class="keyword">using</span> std::endl;
<a name="l00049"></a>00049 <span class="keyword">using</span> std::ostream;
<a name="l00050"></a>00050 <span class="keyword">using</span> std::string;
<a name="l00051"></a>00051 <span class="keyword">using</span> std::tr1::unordered_map;
<a name="l00052"></a>00052 <span class="keyword">using</span> std::vector;
<a name="l00053"></a>00053 
<a name="l00057"></a><a class="code" href="classreranker_1_1_symbols.html">00057</a> <span class="keyword">class </span><a class="code" href="classreranker_1_1_symbols.html" title="An interface specifying a converter from symbols (strings) to int indices.">Symbols</a> {
<a name="l00058"></a>00058  <span class="keyword">public</span>:
<a name="l00059"></a><a class="code" href="classreranker_1_1_symbols.html#ac2f04202711c3f61038ca43656edeb92">00059</a>   <span class="keyword">typedef</span> unordered_map&lt;string, int&gt;::const_iterator <a class="code" href="classreranker_1_1_symbols.html#ac2f04202711c3f61038ca43656edeb92">const_iterator</a>;
<a name="l00060"></a>00060 
<a name="l00061"></a>00061   <span class="keyword">virtual</span> <a class="code" href="classreranker_1_1_symbols.html#ac2f04202711c3f61038ca43656edeb92">const_iterator</a> <a class="code" href="classreranker_1_1_symbols.html#ae63ad8cbeb0ab390a50e9f8b8deaa998">begin</a>() = 0;
<a name="l00062"></a>00062   <span class="keyword">virtual</span> <a class="code" href="classreranker_1_1_symbols.html#ac2f04202711c3f61038ca43656edeb92">const_iterator</a> <a class="code" href="classreranker_1_1_symbols.html#a299004b5ead84217cc11ce43dd41b359">end</a>() = 0;
<a name="l00063"></a>00063 
<a name="l00065"></a>00065   <span class="keyword">virtual</span> <span class="keywordtype">size_t</span> <a class="code" href="classreranker_1_1_symbols.html#a0d4565e346d3c01dbdc54500441ef5c2" title="Returns the number of symbols in this table.">size</a>() <span class="keyword">const</span> = 0;
<a name="l00066"></a>00066 
<a name="l00072"></a>00072   <span class="keyword">virtual</span> <span class="keywordtype">int</span> <a class="code" href="classreranker_1_1_symbols.html#afbf1303d9200f2a0880d1330a89186c1" title="Converts the specified symbol to a unique integer.">GetIndex</a>(<span class="keyword">const</span> <span class="keywordtype">string</span> &amp;symbol) = 0;
<a name="l00073"></a>00073 
<a name="l00076"></a>00076   <span class="keyword">virtual</span> <span class="keyword">const</span> <span class="keywordtype">string</span> &amp;<a class="code" href="classreranker_1_1_symbols.html#aa1f272dec203cba98c2c5bbb128af3b1" title="Returns the unique symbol for the specified index, or the empty string if the specified index does no...">GetSymbol</a>(<span class="keywordtype">int</span> index) <span class="keyword">const</span> = 0;
<a name="l00077"></a>00077 
<a name="l00078"></a>00078   <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classreranker_1_1_symbols.html#aae3fb0d876b17204049c3de8ae8b30f9">SetIndex</a>(<span class="keyword">const</span> <span class="keywordtype">string</span> &amp;symbol, <span class="keywordtype">int</span> index) = 0;
<a name="l00079"></a>00079 
<a name="l00081"></a>00081   <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classreranker_1_1_symbols.html#a3c78e8ddc4a1a1375968a214f4bdda3e" title="Clears all symbols from this symbol table.">Clear</a>() = 0;
<a name="l00082"></a>00082 
<a name="l00089"></a>00089   <span class="keyword">virtual</span> <a class="code" href="classreranker_1_1_symbols.html" title="An interface specifying a converter from symbols (strings) to int indices.">Symbols</a> *<a class="code" href="classreranker_1_1_symbols.html#aaeac8d6c3a9d088aa4f086fa1cf6b2fa" title="Creates a newly-constructed clone of this Symbols instance that has the same runtime type...">Clone</a>() <span class="keyword">const</span> = 0;
<a name="l00090"></a>00090 
<a name="l00103"></a>00103   <span class="keyword">virtual</span> ostream &amp;<a class="code" href="classreranker_1_1_symbols.html#abdd359d5bd905246ff4f7ba71ef140dd" title="Outputs the symbol table to the specified output stream in a simple format, one symbol-to-index mappi...">Output</a>(ostream &amp;os) = 0;
<a name="l00104"></a>00104  <span class="keyword">protected</span>:
<a name="l00105"></a><a class="code" href="classreranker_1_1_symbols.html#a3dd0909558359c12747e9744e16a9791">00105</a>   <span class="keyword">static</span> <span class="keywordtype">string</span> <a class="code" href="classreranker_1_1_symbols.html#a3dd0909558359c12747e9744e16a9791">null_symbol</a>;  
<a name="l00106"></a>00106 };
<a name="l00107"></a>00107 
<a name="l00119"></a><a class="code" href="classreranker_1_1_static_symbol_table.html">00119</a> <span class="keyword">class </span><a class="code" href="classreranker_1_1_static_symbol_table.html" title="A converter from symbols (strings) to int indices.">StaticSymbolTable</a> : <span class="keyword">public</span> <a class="code" href="classreranker_1_1_symbols.html" title="An interface specifying a converter from symbols (strings) to int indices.">Symbols</a> {
<a name="l00120"></a>00120  <span class="keyword">public</span>:
<a name="l00121"></a><a class="code" href="classreranker_1_1_static_symbol_table.html#af8db686d3ab8c8adff44dc8d27cad4e2">00121</a>   <span class="keyword">virtual</span> <a class="code" href="classreranker_1_1_symbols.html#ac2f04202711c3f61038ca43656edeb92">const_iterator</a> <a class="code" href="classreranker_1_1_static_symbol_table.html#af8db686d3ab8c8adff44dc8d27cad4e2">begin</a>() {<span class="keywordflow">return</span> symbols_.begin(); }
<a name="l00122"></a><a class="code" href="classreranker_1_1_static_symbol_table.html#a65349816125ad5fab6aa01d72dbaceb4">00122</a>   <span class="keyword">virtual</span> <a class="code" href="classreranker_1_1_symbols.html#ac2f04202711c3f61038ca43656edeb92">const_iterator</a> <a class="code" href="classreranker_1_1_static_symbol_table.html#a65349816125ad5fab6aa01d72dbaceb4">end</a>() { <span class="keywordflow">return</span> symbols_.end(); }
<a name="l00123"></a>00123 
<a name="l00125"></a><a class="code" href="classreranker_1_1_static_symbol_table.html#afcd12c05728a26a5e5e21f4b9c882db6">00125</a>   <span class="keyword">virtual</span> <span class="keywordtype">size_t</span> <a class="code" href="classreranker_1_1_static_symbol_table.html#afcd12c05728a26a5e5e21f4b9c882db6">size</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> symbols_.size(); }
<a name="l00126"></a>00126 
<a name="l00134"></a>00134   <span class="keyword">virtual</span> <span class="keywordtype">int</span> <a class="code" href="classreranker_1_1_static_symbol_table.html#a09d04029422dc56553fee965355c7653" title="Converts the specified symbol to a unique integer.">GetIndex</a>(<span class="keyword">const</span> <span class="keywordtype">string</span> &amp;symbol);
<a name="l00135"></a>00135 
<a name="l00138"></a>00138   <span class="keyword">virtual</span> <span class="keyword">const</span> <span class="keywordtype">string</span> &amp;<a class="code" href="classreranker_1_1_static_symbol_table.html#af9adc6b0fcc4fa0fe1d4ca24c304285f" title="Returns the unique symbol for the specified index, or the empty string if the specified index does no...">GetSymbol</a>(<span class="keywordtype">int</span> index) <span class="keyword">const</span>;
<a name="l00139"></a>00139 
<a name="l00140"></a><a class="code" href="classreranker_1_1_static_symbol_table.html#a888c6cab274f1ebc5cccbe0ff4c9676c">00140</a>   <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classreranker_1_1_static_symbol_table.html#a888c6cab274f1ebc5cccbe0ff4c9676c">SetIndex</a>(<span class="keyword">const</span> <span class="keywordtype">string</span> &amp;symbol, <span class="keywordtype">int</span> index) {
<a name="l00141"></a>00141     unordered_map&lt;string, int&gt;::const_iterator it = symbols_.find(symbol);
<a name="l00142"></a>00142     <span class="keywordflow">if</span> (it != symbols_.end()) {
<a name="l00143"></a>00143       <span class="comment">// TODO(dbikel): Emit warning message?</span>
<a name="l00144"></a>00144       <span class="keywordtype">int</span> index = <a class="code" href="classreranker_1_1_static_symbol_table.html#a09d04029422dc56553fee965355c7653" title="Converts the specified symbol to a unique integer.">GetIndex</a>(symbol);
<a name="l00145"></a>00145       symbols_.erase(symbol);
<a name="l00146"></a>00146       indices_to_symbols_.erase(index);
<a name="l00147"></a>00147     }
<a name="l00148"></a>00148     symbols_[symbol] = index;
<a name="l00149"></a>00149     indices_to_symbols_[index] = symbol;
<a name="l00150"></a>00150   }
<a name="l00151"></a>00151 
<a name="l00153"></a><a class="code" href="classreranker_1_1_static_symbol_table.html#a1cd9f35e8cbc33e7cc523def6f30ef36">00153</a>   <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classreranker_1_1_static_symbol_table.html#a1cd9f35e8cbc33e7cc523def6f30ef36">Clear</a>() {
<a name="l00154"></a>00154     symbols_.clear();
<a name="l00155"></a>00155     indices_to_symbols_.clear();
<a name="l00156"></a>00156   }
<a name="l00157"></a>00157 
<a name="l00159"></a><a class="code" href="classreranker_1_1_static_symbol_table.html#aad52aaccd83da802389793a25a508ac0">00159</a>   <span class="keyword">virtual</span> <a class="code" href="classreranker_1_1_symbols.html" title="An interface specifying a converter from symbols (strings) to int indices.">Symbols</a> *<a class="code" href="classreranker_1_1_static_symbol_table.html#aad52aaccd83da802389793a25a508ac0">Clone</a>()<span class="keyword"> const </span>{
<a name="l00160"></a>00160     <span class="keywordflow">return</span> <span class="keyword">new</span> <a class="code" href="classreranker_1_1_static_symbol_table.html" title="A converter from symbols (strings) to int indices.">StaticSymbolTable</a>();
<a name="l00161"></a>00161   }
<a name="l00162"></a>00162 
<a name="l00164"></a><a class="code" href="classreranker_1_1_static_symbol_table.html#a6f377e59df1af8e2b51c54c775959217">00164</a>   <span class="keyword">virtual</span> ostream &amp;<a class="code" href="classreranker_1_1_static_symbol_table.html#a6f377e59df1af8e2b51c54c775959217">Output</a>(ostream &amp;os) {
<a name="l00165"></a>00165     <span class="keywordflow">for</span> (unordered_map&lt;string, int&gt;::const_iterator it = symbols_.begin();
<a name="l00166"></a>00166          it != symbols_.end();
<a name="l00167"></a>00167          ++it) {
<a name="l00168"></a>00168       os &lt;&lt; it-&gt;first &lt;&lt; <span class="stringliteral">&quot;\t&quot;</span> &lt;&lt; it-&gt;second &lt;&lt; <span class="stringliteral">&quot;\n&quot;</span>;
<a name="l00169"></a>00169     }
<a name="l00170"></a>00170     os.flush();
<a name="l00171"></a>00171     <span class="keywordflow">return</span> os;
<a name="l00172"></a>00172   }
<a name="l00173"></a>00173 
<a name="l00174"></a>00174  <span class="keyword">private</span>:
<a name="l00175"></a>00175   <span class="comment">// static data members</span>
<a name="l00176"></a>00176   <span class="keyword">static</span> unordered_map&lt;string, int&gt; symbols_;
<a name="l00177"></a>00177   <span class="keyword">static</span> unordered_map&lt;int, string&gt; indices_to_symbols_;
<a name="l00178"></a>00178 };
<a name="l00179"></a>00179 
<a name="l00184"></a><a class="code" href="classreranker_1_1_local_symbol_table.html">00184</a> <span class="keyword">class </span><a class="code" href="classreranker_1_1_local_symbol_table.html" title="A symbol table that stores the mapping from symbols to int&rsquo;s and vice versa in local (non-static) dat...">LocalSymbolTable</a> : <span class="keyword">public</span> <a class="code" href="classreranker_1_1_symbols.html" title="An interface specifying a converter from symbols (strings) to int indices.">Symbols</a> {
<a name="l00185"></a>00185  <span class="keyword">public</span>:
<a name="l00186"></a><a class="code" href="classreranker_1_1_local_symbol_table.html#ada151f14a0306f4a81ab6ccfcc0e19a1">00186</a>   <span class="keyword">virtual</span> <a class="code" href="classreranker_1_1_symbols.html#ac2f04202711c3f61038ca43656edeb92">const_iterator</a> <a class="code" href="classreranker_1_1_local_symbol_table.html#ada151f14a0306f4a81ab6ccfcc0e19a1">begin</a>() {<span class="keywordflow">return</span> symbols_.begin(); }
<a name="l00187"></a><a class="code" href="classreranker_1_1_local_symbol_table.html#a50e9dd7b92056bab7bb90a88efaa4806">00187</a>   <span class="keyword">virtual</span> <a class="code" href="classreranker_1_1_symbols.html#ac2f04202711c3f61038ca43656edeb92">const_iterator</a> <a class="code" href="classreranker_1_1_local_symbol_table.html#a50e9dd7b92056bab7bb90a88efaa4806">end</a>() { <span class="keywordflow">return</span> symbols_.end(); }
<a name="l00188"></a>00188 
<a name="l00190"></a><a class="code" href="classreranker_1_1_local_symbol_table.html#a96b605b29f37e4c57c7953d24ce669b4">00190</a>   <span class="keyword">virtual</span> <span class="keywordtype">size_t</span> <a class="code" href="classreranker_1_1_local_symbol_table.html#a96b605b29f37e4c57c7953d24ce669b4">size</a>()<span class="keyword"> const </span>{ <span class="keywordflow">return</span> symbols_.size(); }
<a name="l00191"></a>00191 
<a name="l00195"></a>00195   <span class="keyword">virtual</span> <span class="keywordtype">int</span> <a class="code" href="classreranker_1_1_local_symbol_table.html#a6e144104f2193b73cb3385ab0230144a" title="Returns the unique index for the specified symbol.">GetIndex</a>(<span class="keyword">const</span> <span class="keywordtype">string</span> &amp;symbol);
<a name="l00196"></a>00196 
<a name="l00198"></a>00198   <span class="keyword">virtual</span> <span class="keyword">const</span> <span class="keywordtype">string</span> &amp;<a class="code" href="classreranker_1_1_local_symbol_table.html#afb6f7c068f48c3acd79ec44acb68a08d">GetSymbol</a>(<span class="keywordtype">int</span> index) <span class="keyword">const</span>;
<a name="l00199"></a>00199 
<a name="l00200"></a><a class="code" href="classreranker_1_1_local_symbol_table.html#a2f161836a8d193575f5ca9130b8efa8e">00200</a>   <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classreranker_1_1_local_symbol_table.html#a2f161836a8d193575f5ca9130b8efa8e">SetIndex</a>(<span class="keyword">const</span> <span class="keywordtype">string</span> &amp;symbol, <span class="keywordtype">int</span> index) {
<a name="l00201"></a>00201     unordered_map&lt;string, int&gt;::const_iterator it = symbols_.find(symbol);
<a name="l00202"></a>00202     <span class="keywordflow">if</span> (it != symbols_.end()) {
<a name="l00203"></a>00203       cerr &lt;&lt; <span class="stringliteral">&quot;LocalSymbolTable::SetIndex: warning: symbol \&quot;&quot;</span> &lt;&lt; symbol
<a name="l00204"></a>00204            &lt;&lt; <span class="stringliteral">&quot;\&quot; already has an index &quot;</span> &lt;&lt; it-&gt;second &lt;&lt; <span class="stringliteral">&quot;; new index: &quot;</span>
<a name="l00205"></a>00205            &lt;&lt; index &lt;&lt; endl;
<a name="l00206"></a>00206       <span class="keywordtype">int</span> index = <a class="code" href="classreranker_1_1_local_symbol_table.html#a6e144104f2193b73cb3385ab0230144a" title="Returns the unique index for the specified symbol.">GetIndex</a>(symbol);
<a name="l00207"></a>00207       symbols_.erase(symbol);
<a name="l00208"></a>00208       indices_to_symbols_.erase(index);
<a name="l00209"></a>00209     }
<a name="l00210"></a>00210     symbols_[symbol] = index;
<a name="l00211"></a>00211     indices_to_symbols_[index] = symbol;
<a name="l00212"></a>00212   }
<a name="l00213"></a>00213 
<a name="l00215"></a><a class="code" href="classreranker_1_1_local_symbol_table.html#ac65bddfa5be4db772296d22849a26a66">00215</a>   <span class="keyword">virtual</span> <span class="keywordtype">void</span> <a class="code" href="classreranker_1_1_local_symbol_table.html#ac65bddfa5be4db772296d22849a26a66">Clear</a>() {
<a name="l00216"></a>00216     symbols_.clear();
<a name="l00217"></a>00217     indices_to_symbols_.clear();
<a name="l00218"></a>00218   }
<a name="l00219"></a>00219 
<a name="l00221"></a><a class="code" href="classreranker_1_1_local_symbol_table.html#a32ae0bd4f482f76b04f80ec9f275e273">00221</a>   <span class="keyword">virtual</span> <a class="code" href="classreranker_1_1_symbols.html" title="An interface specifying a converter from symbols (strings) to int indices.">Symbols</a> *<a class="code" href="classreranker_1_1_local_symbol_table.html#a32ae0bd4f482f76b04f80ec9f275e273">Clone</a>()<span class="keyword"> const </span>{
<a name="l00222"></a>00222     <span class="keywordflow">return</span> <span class="keyword">new</span> <a class="code" href="classreranker_1_1_local_symbol_table.html" title="A symbol table that stores the mapping from symbols to int&rsquo;s and vice versa in local (non-static) dat...">LocalSymbolTable</a>(*<span class="keyword">this</span>);
<a name="l00223"></a>00223   }
<a name="l00224"></a>00224 
<a name="l00226"></a><a class="code" href="classreranker_1_1_local_symbol_table.html#a5ecc591c163f7f2337f957b9fbd7016a">00226</a>   <span class="keyword">virtual</span> ostream &amp;<a class="code" href="classreranker_1_1_local_symbol_table.html#a5ecc591c163f7f2337f957b9fbd7016a">Output</a>(ostream &amp;os) {
<a name="l00227"></a>00227     <span class="keywordflow">for</span> (unordered_map&lt;string, int&gt;::const_iterator it = symbols_.begin();
<a name="l00228"></a>00228          it != symbols_.end();
<a name="l00229"></a>00229          ++it) {
<a name="l00230"></a>00230       os &lt;&lt; it-&gt;first &lt;&lt; <span class="stringliteral">&quot;\t&quot;</span> &lt;&lt; it-&gt;second &lt;&lt; <span class="stringliteral">&quot;\n&quot;</span>;
<a name="l00231"></a>00231     }
<a name="l00232"></a>00232     os.flush();
<a name="l00233"></a>00233     <span class="keywordflow">return</span> os;
<a name="l00234"></a>00234   }
<a name="l00235"></a>00235 
<a name="l00236"></a>00236  <span class="keyword">private</span>:
<a name="l00237"></a>00237   <span class="comment">// data members</span>
<a name="l00238"></a>00238   unordered_map&lt;string, int&gt; symbols_;
<a name="l00239"></a>00239   unordered_map&lt;int, string&gt; indices_to_symbols_;
<a name="l00240"></a>00240 };
<a name="l00241"></a>00241 
<a name="l00242"></a>00242 }  <span class="comment">// namespace reranker</span>
<a name="l00243"></a>00243 
<a name="l00244"></a>00244 <span class="preprocessor">#endif</span>
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